Free-Standing Submerged Installation On Ring Stand; Tightening Torques For Suction And Discharge Flanges - Grundfos SL1 Serie Instructions D'installation Et D'utilisation

7.2 Free-standing submerged installation on ring stand

Pumps for free-standing submerged installation can stand freely
on the bottom of the tank. The pump must be installed on a ring
stand. See fig. 5.
The ring stand is available as an accessory.
In order to facilitate service on the pump, fit a flexible union or
coupling to the elbow on the discharge port for easy separation.
If a hose is used, make sure that the hose does not buckle and
that the inside diameter of the hose matches that of the pump
discharge port.
If a rigid pipe is used, fit the union or coupling, non-return valve
and isolating valve in the order mentioned, when viewed from the
pump.
If the pump is installed in muddy conditions or on uneven ground,
support the pump on bricks or a similar support.
Proceed as follows:
1. Fit a 90 ° elbow to the pump discharge port and connect the
discharge pipe/hose.
2. Lower the pump into the liquid by means of a chain secured to
the lifting bracket of the pump. We recommend to place the
pump on a plane, solid foundation. Make sure that the pump is
hanging from the chain and not the cable. Make sure that the
pump is standing securely.
3. Hang up the end of the chain on a suitable hook at the top of
the tank and in such a way that the chain cannot come into
contact with the pump housing.
4. Adjust the length of the motor cable by coiling it up on a relief
fitting to ensure that the cable is not damaged during operation.
Fasten the relief fitting to a suitable hook at the top of the tank.
Make sure that the cable is not sharply bent or pinched.
5. Connect the motor cable.
The free end of the cable must not be submerged,
Note
as water may penetrate into the cable.
Fig. 5 Free-standing submerged installation on a ring stand
7.3 Tightening torques for suction and discharge
flanges
Grade 4.6 (5) galvanized steel screws and nuts
DN DC Screw
2½" 5½" 4xM16
3" 6" 8xM16
4" 7½" 8xM16
6" 9½" 8xM20
2½" 5½" 4x5/8" UNC
3" 6" 8x5/8" UNC
4" 7½" 8x5/8" UNC
6" 9½" 8x3/4" UNC
Grade A2.50 (AISI 304) steel screws and nuts
DN DC Screw
2½" 5½" 4xM16
3" 6" 8xM16
4" 7½" 8xM16
6" 9½" 8xM20
2½" 5½" 4x5/8" UNC
3" 6" 8x5/8" UNC
4" 7½" 8x5/8" UNC
6" 9½" 8x3/4 UNC
The gasket must be a full face, reinforced paper
Caution gasket like Klingersil C4300. If softer gasket
material is used, torques must be reconsidered.
Specified tightening torques
rounded off by +/- 5
[ft.lbs (Nm)]
Slightly oiled Well lubricated
50 (70) 45 (60)
50 (70) 45 (60)
50 (70) 45 (60)
100 (140) 90 (120)
50 (70) 45 (60)
50 (70) 45 (60)
50 (70) 45 (60)
90 (120) 80 (100)
Specified tightening torques
rounded off by +/- 5
[ft.lbs (Nm)]
Slightly oiled Well lubricated
- 45(60)
- 45(60)
- 45(60)
- 90(120)
- 45(60)
- 45(60)
- 45(60)
- 80(100)
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